Secure Communications Product Brochure 05.00 R&S Series4200 Software Defined Radios VHF/UHF Radio Family for ATC Communications
R&S Series4200 Software Defined Radios At a glance The R&S Series4200 represents the latest generation of stationary radios for both civil and military air traffic control. Possible applications range from small airport emergency systems requiring only a few radio channels to countrywide communications systems with several hundred radio channels. Available versions of the R&S Series4200 radio family VHF (112 MHz to 156 MHz) R&S XU4200 VHF transceiver R&S SU4200 VHF transmitter R&S EU4200C compact VHF receiver 2
Equipment for the VHF and UHF frequency ranges The R&S Series4200 is available in six versions: transceiver, transmitter and compact receiver. The R&S Series4200 radios for the VHF frequency range (112 MHz to 156 MHz) are suitable for civil applications. The R&S Series4200 radios for the UHF frequency range (225 MHz to 400 MHz) are suitable for applications in military air traffic control (air force, navy, army aviation forces). The UHF transceiver allows an external encryption device to be connected. Wide application range and simplified radio planning, even in challenging environments The R&S Series4200 offers an extremely wide range of possible configurations, allowing optimal adaptation to the desired application scenario. The radios were implemented on a software basis in order to provide users of the R&S Series4200 with the widest possible range of applications. New functions are implemented through software upgrades that Rohde & Schwarz makes available at regular intervals. All radios of the R&S Series4200 are multichannel radios, but they can also be software-configured for reliable operation as single-channel radios. Redundant operation of two radios in order to boost the channel availability is possible without any external monitoring and switching equipment. Standard functions include 8.33/25 khz channel spacing for VHF and 8.33/12.5/25 khz channel spacing for UHF, carrier offset 1 to 5 (VHF), ACARS data mode (VHF), LAN remote-control interface, serial interface for controlling automatic filters, and in-band signaling for push-to-talk (PTT) and squelch (SQ) with the capability to set different tones. The R&S Series4200 radios are prepared to support digital voice transmission using the ITU-T G.703 PCM interface and VoIP in accordance with EUROCAE specifications. This function is made available for the VHF radios by means of a software update. Key facts JJ VHF frequency range from 112 MHz to 156 MHz JJ UHF frequency range from 225 MHz to 400 MHz JJ Output power of 50 W for VHF and UHF JJ Automatic main/standby operation JJ USB service port for configuration and software downloads JJ Remote control and remote monitoring via Ethernet interface JJ Best signal selection in the receiver JJ Suitable for data transmission in line with VDL mode 2 standard UHF (225 MHz to 400 MHz) R&S XD4200 UHF transceiver R&S SD4200 UHF transmitter R&S ED4200C compact UHF receiver Rohde & Schwarz R&S Series4200 Software Defined Radios 3
R&S Series4200 Software Defined Radios Benefits and key features Easy to use even in challenging environments JJ Demanding system requirements of civil air traffic control are met or exceeded JJ Excellent RF characteristics JJ Adjacent-channel power better than required by ETSI standard JJ Very low transmitter noise JJ High intermodulation rejection JJ High output power at high modulation depth JJ Very low receiver noise JJ Receiver with excellent immunity to interference JJ Crossmodulation rejection better than required by ETSI standard JJ Two squelch criteria available JJ Low noise/low distortion receiver mode page 5 Maintenance-free operation JJ Extensive self-test routines JJ Simple remote monitoring and remote control JJ Automatic adaptation to ambient conditions JJ Easy remote switching when using redundant radios JJ Electronic inventory and recalibration JJ No recalibration for 15 years with optional OCXO page 7 Straightforward operation and configuration JJ PC-based tools with graphical user interface JJ Reliable protection against operation errors JJ Warning messages in case of unauthorized local operation JJ Easy remote control and monitoring via IP connection page 8 Flexibility for system integration JJ Adaptation of in-band signaling for PTT and squelch to existing voice communications systems JJ Extreme flexibility in management system selection JJ Seamless transition from analog to digital voice transmission on the network side JJ Support for voice over IP via software upgrade page 9 Small footprint due to compact, modular design JJ Very compact design JJ Three basic modules: transmitter, receiver, power supply unit page 10 R&S XU4200 VHF transceiver. 4
Easy to use even in challenging environments Particularly in the civil sector, air traffic control places very demanding requirements on the radios used. The VHF radios are operated under conditions involving significant RF interference. High-quality communications are required even in the presence of strong interference. Of course, the radios themselves should generate as little interference as possible. Demanding system requirements of civil air traffic control are met or exceeded The transmitters and receivers of the R&S Series4200 perform as required, particularly in challenging environments. They exhibit outstanding technical characteristics which simplify radio planning. All VHF radios of the R&S Series4200 comply with or exceed the applicable standards from ICAO (Annex 10, Vol. III) and ETSI (EN 300676). Excellent RF characteristics The VHF transmitters use an I/Q modulator with a Cartesian feedback loop. This ensures that the VHF transmitters have excellent RF characteristics. The following provides a detailed overview of the RF characteristics. Adjacent-channel power better than required by ETSI standard The adjacent-channel power is 70 db at 25 khz and 60 db at 8.33 khz. This means that these values are 10 db better than required by the ETSI standard. Receiving stations in the vicinity therefore experience hardly any interference, which gives users increased system reserves and safety of planning. Very low transmitter noise The transmitter noise is very low with a value of typ. 145 dbc (1 Hz) at 300 khz from the carrier or 155 dbc (1 Hz) at 1 % from the carrier. This minimizes spurious emissions from the transmitter, helping to reduce receiver interference particularly in installations involving collocation. High intermodulation rejection Due to the high intermodulation rejection, an external circulator is not required in many cases. If an external circulator is used nevertheless, the radio allows evaluation of an external VSWR measurement that is required in such cases. High output power at high modulation depth The 50 W output power at the high modulation depth of 90 % is available even under challenging ambient conditions (temperature, VSWR). The modulation distortion is max. 5 % for a modulation depth of 90 %. A limiter at 95 % prevents overdrive. The transmitter is designed for 50 W continuous operation (100 % duty cycle) up to an ambient temperature of +40 C. This makes the R&S Series4200 also ideal for ATIS or VOLMET transmitters. Rohde & Schwarz R&S Series4200 Software Defined Radios 5
Very low receiver noise The VHF receiver has a very low noise factor to provide outstanding reception even under tough conditions. It also offers excellent immunity to interference. In many cases, frequency replanning is therefore not necessary when adding additional channels to existing radio sites. The receive sensitivity is 107 dbm (measured in accordance with EN 300676). The required 93 dbm receive power in accordance with ICAO Annex 10, Vol. III, provides high planning reserves. This means that high antenna cable losses or insertion losses of receive filters can be tolerated without any impact on receive quality. Receiver with excellent immunity to interference The permissible interfering signal for maximum desensitization of 6 db has a power level of 12 dbm, measured in accordance with EN 300676. This value is 15 db above the limit specified by ETSI. This ensures reliable and secure reception even under challenging collocation conditions. Crossmodulation rejection better than required by ETSI standard The crossmodulation rejection of 95 db, which is 15 db above the value specified by ETSI, reduces undesired crossmodulation due to interfering signals. This makes the receiver less susceptible to interference that can hardly be eliminated. External filters are therefore not required in many cases. Two squelch criteria available The receiver includes two squelch criteria which can be logically combined (AND, OR). The squelch criterion can be based on the receive power, the S/N ratio of the demodulated useful signal or a logical combination of these two criteria. Both thresholds can be set independently in a wide range. Low noise/low distortion receiver mode In an environment with a high noise or interference level, reducing the receiver sensitivity may be necessary in order to achieve better large-signal characteristics. This step makes the receiver less sensitive to interferences. The lower sensitivity is less critical than the gain in signal quality. The R&S Series4200 receivers can be configured in the low noise mode or in the low distortion mode; in the low distortion mode, sensitivity is reduced by 6 db. Distance between transmitter and receiver Minimum required distance The minimum required distance between transmitter and receiver is about five times larger (worse) in ETSI-compliant radios compared to the R&S Series4200. R&S SU4200 transmitter R&S EU4200C receiver Minimum required distance (approx. 5 times larger) ETSI-compliant transmitter ETSI-compliant receiver Parameter ETSI EN 300676 R&S Series4200 Broadband noise of transmitter (±300 khz) 130 dbc typ. 145 dbc Desensitization of receiver 80 db 95 db Minimum distance required approx. 1.5 km approx. 350 m Minimum distance required between transmitter and receiver sites for same SINAD. 6
Maintenanc e-free operation The radios of the R&S Series4200 are designed for maintenance-free operation. They adapt automatically to the current ambient conditions and offer different functions for remote monitoring and remote control. This nearly eliminates the need to perform on-site maintenance work on the radios. Extensive self-test routines Extensive monitoring routines (continuous built-in tests, CBIT) run in the background to keep the user always informed about the status of the equipment. More than 80 parameters are monitored and any deviation from the permissible range is displayed as a CBIT message. There are two urgency levels: warning and alarm. A warning is merely displayed, while an alarm also triggers switchover to a redundant standby radio if one is present. Simple remote monitoring and remote control CBIT messages are displayed on the HMI, can be read by the service PC and are also available via the remote-control interface. The transmitter can also be keyed remotely via the Ethernet interface. It is then possible to measure the output power, modulation and VSWR in this manner and read out the results via the remote-control interface. The receive power can be read off similarly on the receiver. R&S ZS4200 service and maintenance tool Automatic adaptation to ambient conditions When ambient conditions such as the temperature, supply voltage or VSWR are outside the nominal range, the transmitter will decrease its own power stepwise in order to maintain operation as long as possible. If the ambient conditions return to their nominal range, the transmitter will automatically switch back to nominal operation with no manual intervention required. Easy remote switching when using redundant radios When redundant radios are used (main/standby operation), it is possible to manually switch from a remote location between the active and passive radio with practically no interruption (<200 ms). This allows the operator to check and make sure at any time that the non-active radios are still operational. In case of a problem, operation can be maintained at the appropriate frequency without any onsite intervention. Electronic inventory and recalibration The radio and each module have all relevant inventory data such as serial number, device type and software version stored electronically. This data can be retrieved locally or via the remote maintenance tool. In addition, installation or maintenance information can be stored in the radio by the operator. Maintenance is limited to recalibration of the reference oscillator (TCXO), which is possible with the service PC connected to the radio without having to open the radio. Repair involves simply replacing the defective module. No hardware-related settings are required after repair. No recalibration for 15 years with optional OCXO With the use of the optional high-precision oscillator (OCXO) in the VHF transmitter or VHF transceiver, a frequency accuracy of ±0.3 ppm is reached, which is required for five-carrier offset operation. This value is maintained over the entire operating temperature range of 20 C to +55 C. The high quality of this oscillator delivers a frequency error of ±1.5 ppm over a lifetime of 15 years with no recalibration. This accuracy permits offset operation with up to four carriers. Use of the OCXO can be enabled at a later time by entering a software option code. Rohde & Schwarz R&S Series4200 Software Defined Radios 7
Straightforward operation and configuration The radios of the R&S Series4200 offer many diverse functions that help ensure straightforward, secure and error-free operation. PC-based tools with graphical user interface The radios are configured using the service PC's graphical user interface in conjunction with the R&S ZS4200 service and maintenance tool. There is no need to open the radio, e.g. to make configuration settings using DIP switches or jumpers. Different configurations can be created on the PC for subsequent on-site loading into the radio. To ensure that a faulty radio can be exchanged quickly, its configuration can be cloned and transferred to a new radio. This means that such an exchange is performed very fast (typically in 15 minutes). Reliable protection against operation errors All radio versions can be operated in fixed-channel mode. This mode makes it impossible to change the set frequency via HMI or remote control without proper authorization. The radio is configured accordingly using the service PC. If frequency settings are allowed, the user can exclude one or more channels in the VHF or UHF band from the list of possible configurations. The required frequency blocking table is configured using the service PC and is loaded into the radio. This prevents the radio from accidentally operating on a frequency that is not permitted, e.g. the frequency of a radionavigation system. Warning messages in case of unauthorized local operation To prevent unauthorized local operation, a CBIT warning message can be activated that indicates if the radio is switched to local mode or the service PC is connected to the radio. At the same time, such activities are recorded in the radio's internal event log. This makes it possible to track all activities involving the radio at any time. The event log can be read locally or from a remote site. Easy remote control and monitoring via IP connection Remote control and monitoring are handled via an Ethernet connection between the radio and the management system. To ensure that only authorized users can connect to the radio, an access control list is saved in the radio. It contains the IP addresses with which the radio is allowed to communicate. Communications requests from other IP addresses are rejected. 8
Flexibility for system integration The radios of the R&S Series4200 provide flexibility when connected to a voice communications system (VCS) and a management system. Regular software upgrades ensure future viability of the radios. Adaptation of in-band signaling for PTT and squelch to existing voice communications systems The in-band signaling for PTT and squelch can be adapted to existing voice communications systems (VCS), making it unnecessary to reconfigure or exchange any of the VCS components. Signaling techniques that allow quality evaluation of the receive level can also be implemented in a straightforward manner. The in-band signaling used in the radio does not require any external components. Tone generation, filtering and evaluation are all performed by the software using a DSP. Extreme flexibility in management system selection The radios of the R&S Series4200 can be controlled and monitored using the Rohde & Schwarz protocol or the simple network management protocol (SNMP). This ensures that users have maximum flexibility when selecting a management system. Possible choices include the R&S RCMS II remote control and monitoring system or any commercially available system that is based on SNMP. It is also possible to switch from SNMP to the R&S RCMS II (or vice versa) at a later point in time. Alternatively, both management systems can be used in parallel. Seamless transition from analog to digital voice transmission on the network side In many countries, analog connections for linking the radio sites will soon no longer be available. In these cases, the voice signal will be transmitted digitally over 2 Mbit/s connections. The R&S Series4200 radios can therefore be connected to the voice transmission system via a digital E1 interface. This function is made available as a software update, which also enables the user to convert from analog to digital voice transmission at some point in the future. This opens the door to fully digital systems from the microphone to the antenna. Support for voice over IP via software upgrade A further step toward a future-ready radiocommunications system is the voice over IP (VoIP) alternative. The cost-effective IP links make it possible to set up a high-availability transmission network. The R&S Series4200 radios can be enhanced to handle the EUROCAE-compatible VoIP technology by means of a software upgrade. Conversion to VoIP at some point in the future therefore becomes possible provided that the remaining infrastructure is available. This means that the one-off investment in radiocommunications will continue to pay off over the long term. Rohde & Schwarz R&S Series4200 Software Defined Radios 9
Small footprint due to compact, modular design Due to its very compact and lightweight design, the R&S Series4200 makes it possible to add new channels at existing sites without having to perform any construction work. New radio installations can also be designed to be smaller, which helps to cut construction costs. Very compact design Space requirements are 19"/2, three height units for one transmitter or one receiver (UHF only) or one transceiver. To further decrease the space required, a compact receiver is available as an alternative. This receiver type is accommodated in a housing of half the size, i.e. 19"/4 width. The receiver module is the same as in the standard housing. This means that the following equipment can be arranged in one 19" row of three height units: JJ Two transceivers or two transmitters or any combination of these devices JJ Four compact receivers Up to 24 transmitters or transceivers can thus be accommodated in the KG4200 standard 19" rack (or up to 48 compact receivers). No external components are required for operation except any desired optional filters or multicouplers. For remote monitoring, all that is needed is an additional Ethernet switch or router. Three basic modules: transmitter, receiver, power supply unit The design of the R&S Series4200 is based on a modular structure consisting of three modules. These modules are the transmitter, the receiver and the power supply unit. Depending on the required configuration, these modules are accommodated in the appropriate housing. The housing is equipped with keypad, eight-line display, loudspeaker, headset connector and LEDs. The housing is the same for all configurations and frequency bands and is very compact, which enables flexible deployment. It is suitable for 19" system rackmounting. R&S EU4200C compact VHF receiver. 10
Transmitter and receiver The transmitter and receiver are designed as independent, EMC-shielded modules that contain all required external interfaces. The transmitter, receiver and HMI controller communicate via the USB bus with the R&S ZS4200 service and maintenance tool. The transmit and receive modules each contain an Ethernet interface (100BaseT) that is used for control and remote monitoring of the transmitter/receiver. The transmitter and receiver have independent synthesizers that are synchronized to the TCXO reference signal. This allows the transceivers to operate simultaneously in transmit and receive mode, which serves as a basis for true side tone or relay operation. Integrated transmit/receive switch The transmit module contains an integrated, wear-free PIN diode switch for switching between transmit and receive mode. This allows users at transceiver sites to choose whether they wish to use separate transmit and receive antennas or a common transmit/receive antenna. No configuration changes or settings are needed on the radio. Modular design of the R&S XU4200 Modular design of the R&S XU4200 VHF transceiver. Backplane HMI controller Front panel R&S KK4250 housing R&S IN4240 power supply unit Fan R&S VU4250 transmitter module with interface R&S EU4250 receiver module with interface Rohde & Schwarz R&S Series4200 Software Defined Radios 11
Power supply The modules are powered via the backplane, or (in the case of the power amplifier) directly by the power supply module. The power supply is an independent, EMC-shielded module that contains all required external interfaces. It allows operation of the radio from AC, DC or a combination of the two. Interruption-free switchover occurs in case of failure of the AC supply. The power supply has a wide supply voltage range and can be operated with 230 V AC or 115 V AC without manual switchover. The user stays informed about the availability (or dropout) of the supply voltages using LEDs on the radio as well as warning messages to the management system. The power supply is available as a 400 W and as a 45 W version. The 400 W power supply is used in the transmitter and transceiver while the smaller 45 W power supply is used in the receiver. Housing with HMI controller The HMI controller is part of the housing. It includes the control of the radio and the interface to the user. The HMI controller allows the radio to be operated using the integrated keypad and display. Configuration of the radio is possible via the USB interface. Software updates and upgrades are handled via the USB bus as well. The HMI controller with identical functionality is used both in the standard housing and in the compact housing. Modular design of the R&S EU4200C HMI controller Front panel Modular design of the R&S EU4200C compact VHF receiver. R&S KK4250C housing R&S EU4250 receiver module with interface Backplane Fan R&S IN4210 power supply unit 12
Tower application The R&S Series4200 transceivers are ideal for standalone applications without a voice communications system (VCS) being necessary. The transceivers can be used directly as desktop radios merely by connecting an antenna and a headset or microphone. For remote operation, an audio panel that can be integrated into an operator console is available. If a controller needs to access multiple radios, the R&S GB208 remote audio unit allows up to eight transceivers to be connected. Cascading of the R&S GB208 enables multiple controllers to share a set of radios. Local operation Antenna XU4200 Controller Remote operation XU4200 XU4200 XU4200 GB208 GB208 Controller Controller Rohde & Schwarz R&S Series4200 Software Defined Radios 13
Radio site In large radiocommunications systems, transmitters and receivers are often located at different sites to prevent them from affecting each other. The R&S SU/SD4200 transmitters and the R&S EU/ED4200 receivers are the right choice for these applications. Rohde & Schwarz offers all components necessary for a complete radio site. This includes racks, multicouplers, filters and antennas. To support applications that require a change in the transmit frequency, automatic filters are available. These filters are switched to the new frequency by the radio. To monitor the radio systems, operators can rely on the R&S RCMS II. It can output the status of all radios available in the network for the operator at any time. Fully equipped R&S KG4200 radio cabinet rack. 14
Radio site configuration HK012 VHF antenna HK014 VHF/UHF antenna Radio site KG4200 SU4200 transmitter EU4200C receiver XD4200 transceiver ATCMC16 receive multicoupler R&S RCMS II remote control and monitoring system Area control center VCS TX radio site RX radio site VCS TX radio site RX radio site Rohde & Schwarz R&S Series4200 Software Defined Radios 15
Data application Data communications between the aircraft and the airline s flight operations center can be sent over communications networks operated by commercial service providers. The radio systems operate in the same VHF frequency range as the voice communications for air traffic control (ATC) so that the same radios can be used on board the aircraft. Data communications on the ground are handled by the VHF radios from the R&S Series4200. These transceivers can be operated both in the ACARS mode and in VDL mode 2. Airline operational communications HK012 HK012 XU4200 XU4200 WAN Router Router Dispatcher 16
Front view Transceiver/transmitter LC display Front view of the transceivers and transmitters of the R&S Series4200. Loudspeaker Volume control for headset and loudspeaker Power switch USB service Headset LEDs Keypad port connector Compact receiver Front view of the compact receivers of the R&S Series4200. Loudspeaker LC display Headset connector Keypad LEDs USB service port Rohde & Schwarz R&S Series4200 Software Defined Radios 17
Rear view Transceiver Ethernet LAN remote control RX input E1/T1 interface Ethernet LAN remote control Integrated TX/RX switch DC input/ battery input Rear view of the VHF transceiver of the R&S Series4200. Battery fuse E1/T1 interface AC line fuses RX audio, RX audio, TX audio, TX audio, TX output/com- AC input basic extended basic extended mon antenna Compact receiver RX input Rear view of the VHF compact receiver of the R&S Series4200. Ethernet LAN remote control DC input/battery input E1/T1 interface AC input RX audio, basic RX audio, extended 18
Ordering information Designation Type Order No. R&S Series4200 VHF Multichannel Radios VHF Transceiver 50 W, 112 MHz to 156 MHz R&S XU4200 6144.7300.02 VHF Transmitter 50 W, 112 MHz to 156 MHz R&S SU4200 6144.7500.02 Compact VHF Receiver 112 MHz to 156 MHz R&S EU4200C 6144.7800.02 R&S Series4200 UHF Multichannel Radios UHF Transceiver 50 W, 225 MHz to 400 MHz R&S XD4200 6146.6000.02 50 W, WB interface, 225 MHz to 400 MHz R&S XD4200 6133.8500.06 UHF Transmitter 50 W, 225 MHz to 400 MHz R&S SD4200 6146.6100.02 Compact UHF Receiver 225 MHz to 400 MHz R&S ED4200C 6146.6300.03 Accessories (external options) Service and Maintenance Tool R&S ZS4200 6133.8722.07 Headset, dynamic microphone R&S GA4200D 6133.8780.00 Microphone, mini-din connector R&S GA016H1 0583.5568.03 Adapter for standard headset R&S GA4220 6137.1274.00 Headset R&S GA4210 6137.1245.00 Mating Connector Set for the R&S XU4200 R&S ZF4200 6137.1568.02 Mating Connector Set for the R&S SU/SD4200 R&S ZF4200 6137.1568.03 Mating Connector Set for the R&S EU/ED4200 R&S ZF4200 6137.1568.04 Mating Connector Set for the R&S XD4200 R&S ZF4200 6137.1568.05 Filler Plate 19"/2 R&S BP4201 6130.2269.02 Filler Plate 19"/4 R&S BP4202 6130.1616.02 System components Antennas see catalog Automatically tunable filters on request Manually tunable filters see catalog Receive Multicoupler R&S ATCMC see catalog Remote Control and Monitoring System R&S RCMS II see catalog Racks R&S KG4200 see catalog VHF Power Amplifier, 200 W R&S VU220L see catalog AF Control Unit R&S GB208 see catalog AF Distribution Splitter/Combiner R&S GH215 see catalog Control unit R&S GB4000T see catalog For data sheet, see PD 5213.5700.22 and PD 5214.0118.22 and www.rohde-schwarz.com Rohde & Schwarz R&S Series4200 Software Defined Radios 19
Service you can rely on J Worldwide J Local and personalized J Customized and flexible J Uncompromising quality J Long-term dependability About Rohde & Schwarz Rohde & Schwarz is an independent group of companies specializing in electronics. It is a leading supplier of solutions in the fields of test and measurement, broadcasting, radiomonitoring and radiolocation, as well as secure communications. Established 75 years ago, Rohde & Schwarz has a global presence and a dedicated service network in over 70 countries. Company headquarters are in Munich, Germany. Environmental commitment JJ Energy-efficient products JJ Continuous improvement in environmental sustainability JJ ISO 14001-certified environmental management system Certified Quality System ISO 9001 Certified Quality System EN 9100 Certified Quality System AQAP-2110 Certified Quality System EN 9110 Rohde & Schwarz GmbH & Co. KG www.rohde-schwarz.com Regional contact JJ Europe, Africa, Middle East +49 89 4129 137 74 customersupport@rohde-schwarz.com JJ North America 1 888 TEST RSA (1 888 837 87 72) customer.support@rsa.rohde-schwarz.com JJ Latin America +1 410 910 79 88 customersupport.la@rohde-schwarz.com JJ Asia/Pacific +65 65 13 04 88 customersupport.asia@rohde-schwarz.com R&S is a registered trademark of Rohde & Schwarz GmbH & Co. KG Trade names are trademarks of the owners Printed in Germany (ch) PD 5213.5700.12 Version 05.00 December 2009 R&S Series4200 Data without tolerance limits is not binding Subject to change 2009 Rohde & Schwarz GmbH Co. KG 81671 München, Germany